(19)

(11)

EP 1 639 236 A2

(12)

(88) Date of publication A3: 02.06.2005 (43) Date of publication: 29.03.2006 Bulletin 2006/13 (21) Application number: 04750684.5 (22) Date of filing: 26.04.2004

(51) International Patent Classification (IPC):  F01N 1/00(1968.09) (86) International application number: PCT/US2004/012854 (87) International publication number: WO 2005/005794 (20.01.2005 Gazette 2005/03)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 25.06.2003 US 607249 (71) Applicant: Corning Incorporated Corning, New York 14831 (US)	(72) Inventors: MERKEL, Gregory, A Corning, New York 14830 (US) TAO, Tinghong Big Flats, NY 14814 (US) (74) Representative: Sturm, Christoph  Quermann Sturm GbR Patentanwälte Unter den Eichen 7 65195 Wiesbaden 65195 Wiesbaden (DE)